Synthesis and Antiallergic Activities of 2-Alkyl-3,4-dimethylfuro(2,3-c)pyrazole-5-carboxamides and Related Compounds.
作者:Li-Jiau HUANG、Sheng-Chu KUO、Jih-Pyang WANG、Katsumi ISHII、Hideo NAKAMURA
DOI:10.1248/cpb.42.2036
日期:——
A series of 2-substituted 3,4-dimethylfuro[2,3-c]pyrazole- 5-carboxamides and related compounds have been synthesized and their antiallergic activities were evaluated. Most derivatives with a lower alkyl group at position 2 were orally active. Among them, N-ethyl-2,3,4-trimethylfuro[2,3-c]pyrazole- 5-carboxamide (III3),2-ethyl-N-methyl-3,4-dimethylfuro[2,3-c]pyrazole-5-ca rboxamide (III14), 2-isopropyl-N-methyl-3
已经合成了一系列2-取代的3,4-二甲基呋喃[2,3-c]吡唑-5-羧酰胺和相关化合物,并评估了它们的抗过敏活性。大多数在2位具有低级烷基的衍生物具有口服活性。其中,N-乙基-2,3,4-三甲基呋喃[2,3-c]吡唑-5-羧酰胺(III3),2-乙基-N-甲基-3,4-二甲基呋喃[2,3-c]吡唑-5-邻甲酰胺(III14),2-异丙基-N-甲基-3,4-二甲基呋喃[2,3-c]吡唑-5-甲酰胺(III27),5-(4,5-二氢-5-氧代-1,3,4-恶二唑-2-基)-2,3,4-三甲基呋喃[2,3-c]吡唑(IV1)和5-(4,5-dihydro-5-oxo-1,3 ,4-恶二唑-2-基)-2-异丙基-3,4-二甲基呋喃[2,3-c]吡唑(IV3)显示出有希望的抗过敏作用。研究了这些3,4-二甲基呋喃并[2,3-c]吡唑衍生物的构效关系。酰胺或5-氧代-1,3,在位置5处的4-恶二唑取代